Die-head.



B. BURDEN.

DIE HEAD.

APPLICATION FILED JAN.11,1911.

1,036,550; Patented Aug. 27, 1912.

2 SHEBTS-SHEET l.

wi lmmmo BraqifG/d Bai'deia B. BURDEN.

DIE HEAD.

APPLICATION FILED JAN. 11, 1911.

1,036,550, Patented Aug. 27, 1912.

2 SHEETSSHEET 2.

Brad faz'dflarzierz,

BRADFORD BORDEN, or ronon'ro,

ONTARIO, CANADA, ASSIGNOR TO THE BORDEN COMPANY, OF WARREN, OHIO, A CORPORATION OF OHIQ.

DIE-HEAD.

Patented Aug. 211, 1912.

Application'filed January 11, 1915. Serial No. 802,006.

To all whom it may concern:

Be it known that I, BRADFORD BORDEN, Toronto, in Dominion of Canada, have invented certain new and useful Improvements in Die- Heads;' and 1 do hereby declare the following'to be a full, clearyand exact description of the invention, such as will enable others skilled in the art to which :it appertains tomake and use the same.

The primary object of this invention is to provide a die-head which maybe employed with equal facility-on either the live spindle or the dead spindle of alathe'; and a further object is to vprovide in a die-head for cutting tapered threads-on pipes or other cylindrical bodies, improved means for throwing the chasers out of engagement with the work at the completion of the threading operation,-or at any point duringthe'threading operation while the die-head is'in-operation.

The invention will be hereinafter fully set forth and particularly :poi'nted'out in the claims.

In the accompanying drawings, Figure 1 is an end elevation. Fig. '2 is a side elevation. Fig. '3 is a plan view. Fig. 4 is a view in perspective of the plate-controlling post.

Referring to the drawings, 1 designates a housing or chaser-carrier which is provided with a tubular sleeve 2 which :is designed to be held in a suitable socket ofa lathe. The ehasers 3 are arranged in radial guidewa'ys in thechaser-carrier, and each chaser is engaged by a cam plate 4 which has eccentrically-arranged chaser-ehgaging means, as indicated in'dotted lines, 1.

5 and 6 designate two posts which-are projected through openings in the chaser-carrier.. The 'ost 5 has an interlocking engagement with the chaser'engaging plate 4, such engagement being shownas consisting of a diagonallysanranged lug 7 -on the inner face of the post. fitting in a peripheral cutout in the plate. Upon the posts being moved longitudinally, on a plane parallelingthe axis of the chaser-carrier, engaging plate 4 will be rotated and thereby. control the recession of the 'chasers. If the chaser-carrier. is on the live spindle of the lathe this notation of 'the -chaser-engaging the Province of Ontario andthe chaser is passed transversely "through a longitudinalslot in sleeve 2, and atits center has a stop 10 with which the end of the pipe being threadedis designed to engage, which engagement causes the posts to move longi tudinally, Neither the chaser-carrier nor any. portion thereof, nor the chaser-engaging plate, has any longitudinal movement.

The lug 7 at its outer end has an acute pitch, as shown at 12, so thatat'the termination of the longitudinal travel of. the posts the chasenengaging plate will he turned to. an extent sufiicientto throw the chasers out of engagement with the work} Thethrow out of the chasers will occur automatically. at the end of thethreadingl operation, or it may be manually effectedat any sta e while the die-head is in operation, simply y moving rearwardly the post-carrying cross-bar longitudinally of the axis of the die-head. For the purpose of enablingthe throw out to be :efiected manually at :any stage of the operation, any suitable meansxmay be employed, for instance, a collar 13' slidabty mounted on sleeve '2 and equipped with a peripheral. groove 14 iiior'takm'g in shoes 15 carried by the ring'portion 16 of a lever I7, the handled end of which latter is located beneath the die-head. Through opposite openings in this collar :is passed cross-bar 8 so that :any movement of the collafilongi tudinally' of the axis of the die-head will carry the oross-barwith it, and this 'turn will move the posts relatively to the chasercarrier. By this means the operator by manipulating lever 17 may, even While the die-head is rotating, throw out :the chasers at any desired 0faint in the cutting operation. This is advantage especially when it is desired to cut a short thread. The inward movement of the chasers is likewise under the control of the :lever. When-the die-headis on the dead spindle of a lathe 1 "out the chasers atany point, regardless of .stop 10 a relative movement is produced beof thelatter-the operator may advance the turning of the cam plate, and hence throw whether the die-head is fixed 'or I claim as my invention 1. A die-head comprising a chaser-cars rier, a series ofradially-arranged chasers,

rotating. 1

a chaser engaging plate rotatable relativelyto the chaser-carrier, means-having 'a long1- tudinal-movement parallel to the axis of'the chaser-carrier during the thread ng operation, such means cooperating with such chaser-engaging plate for controlling the rotation thereof, means for eliecting the throw. out] of the chasers normally at a predetermined point in the threading operation, andfmeans. capable of rendering the last mentioned means effective before the predetermined oint of operation is reached.

' 2. A die-headcomprising a chaser-car-' .rler, a series of radially-arranged chasers,

a chaser-engaging plate rotatable relatively tothe chaser-carrienmeans having a longitudinal movement parallel, to' the axis of the chaser-carrier during the threading operation, such means cooperating with such chaser-engagingplate for controlling the rotation thereof, means for automatically effecting a further rotation of the chaser engaging plate to throw out the chasers at a predetermined eration, and manually controlled means capable of advancing the'chaser throwingoutmean's before the predetermined point of operation is reached.

3. A die-head comprising a chaser-carriei', a'series of radiallv-arranged chasers, a

chaserrengaging plate rotatable relatively to the chaser-carrie1;, means having a longi-.

tudinal movement parallel to the axis of the chaser-carrier during the threading operation, such means cooperating with such chaser-engaging platefor controlling the rotation thereof, means with which the article being threaded is designed to engage for moving thefirst mentioned means longitudinally during the threading operation, and other means capable of advancing the movement of the article-engaging means independentlv of its engagement with the arti e. a

4. A die-head comprising a chaser-carrier, a series of radially-arranged chasers, a chaser-engaging plate rotatable relativelv to the ch'aserwarrier, means having a longitudinal movement parallel to the axis of the chaser-carrier during the threading operapoint in the threading 015- which the article post longitudinally,

tion, such means coiiperating with such chaser-engaging plate for controlling the rotation thereof; means for automatically effecting a further rotation of the chaserengaging plate to throw out the chasers at the termination of the longit-udinal .travel of the aforementioned means, means with which the article being threaded is designed to engage'for moving the first mentioned means longitudinally duringthe threading operation, and other means capable "of adto the chaser-carrier, a post havin'ga longi-' tudinal movement parallel to the axis of the chaser-carrier during the threading operation, 'sucliv post cooperating with such chaser-engaging plate for controlling the rotation thereof, a stop carried by said post and lwith which the article being threaded is designed to engage for automatically. moving thepost longitudinally, means carried by'the post for throwing out the chasers at the termination of its longitudinal travel, and means for moving the post independently of its movement by the article being threaded to throw out the chasers at any point in the threading operation.

6. A die-head comprising a chaser-carrier, a series of radially-arranged chasers, a chaser-engaging to the chaser-earner, a post having a longiplate rotatable relativelv tudinal movement parallel to the axis of the chaser-carrier during the threading operation, such post cooperating with such chaserengaging plate for controllingthe rotation thereof, a stop carried by said post and with being'threaded is designed automatically moving the and manually-operable the post independently by the article being to engage for means for moving of its movement threaded. r v

7. A die-head comprising a chaser-carrier, a series of radially-arranged chasers. a chaser-engaging plate rotatable relatively to the chaser-carrier, a post'having a longitudinal movement. a cross-bar arranged perpendicularly to the axis of the chaser-carrier, a stop connected to said cross-bar and designed to he engaged by the article being threaded to move said post longitudinallv,

a member movable longitudinally of the axis of the chaser-carrier control said cross bar, ing such member.

8. A die-head comprising a chaser-carrier, a series of radiallv-arranged chasers, a chaser-engagin plate rotatable re'lativelv to the chaser-carrier, a post having a longitudinal movement,- a cross bar arranged perand designed to and means for movpendicularly to the axis of the chaser-carrier, a stop connected to said cross bar and designed to be engaged by the article to be threaded to move said post longitudinally, a collar movable longitudinally of the axis of the chaser-carrier and designed to control said cross bar, and a lever for shifting said collar. 9. A die-head comprising a chaser carrier having no longitudinal movement, chasers movable therein, a chaser-engaging plate having normally a uniform movement relatively to the chaser-carrier, an. element movable on a plane paralleling the axis of the chaser-carrier for controlling said chaser-engaging plate, cooperating means to positively throw out the chasers at the completion of the travel of said element, and means capable of moving such element in advance of its normal movement.

10. A die-head comprising a chaser-carrier, chasers movable therein, a chaser-cargaging plate movable relatively to the chaser-carrier, a post movable longitudinally on a plane parallel with the axis of the chaser-carrier and engaging said plate to control the rotation thereof, means with which the article being threaded is designed to engage to automaticallyefi'ect the movement of said post, means for positively throwing out the chasers at the completion of the travel of said post, and manuallyoperablemeans for moving said post and the article-engaging means.

In testimony whereof, I have signed this specification in the presence of two subscribing witnesses.

BRADFGRD BURDEN.

Witnesses J. B. TAYLOR, W. H, BEOHTEL. 

